sh: Add support sh2 to MAKEALL

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

MAKEALL

@@ -805,7 +805,7 @@ do
 	|mips|mips_el \
 	|nios|nios2 \
 	|ppc|5xx|5xxx|512x|8xx|8220|824x|8260|83xx|85xx|86xx|4xx|7xx|74xx|TSEC \
-	|sh|sh3|sh4 \
+	|sh|sh2|sh3|sh4 \
 	|sparc \
 	|x86|I486 \
 	)